Trip casing-spear.



PATENTED FEB. 13, 1906.

W. H. KBSSELMAN.

I TRIP CASING SPEAR.

APPLICATION FILED OUT. 19, 1905.

A TTOHN INVENTOR ZhZZiamf/ffimwlman ll fi fl W i lfivhm va .9 M

I/ l q UNITED STATES PATENT OFFICE.

WILLIAM H; KESSELMAN, or PARKERSBURG, WEST VIRGINIA. TRIP cAsmG-sPEAv-i.

Specificatioxr of Letterslateht.

. Patentediieb. 13, 1906.

To all whom it may concern: I

Be it known that I, WILLIAMH. KEssEL MAN, a ('ii izen of the United States, and a resident of Parkersburg, in the county of Wood and State of West Virginia, have invented a new and Improved Tri Casing-Spear, of which the following is a fu 1, clear, and exact description.

My invention relates to a trip casing-spear for use in oil-wells and the like.

Casing-spears asheretofore constructed have been in general of two kinds: first,

those in which jaws are forced against the in and, furthermore, to

' the device from the wa ls of the casing when ner wall of a casing along ways or a' groove, and, second, those in which the so-called bull-dog gripis used. In the first form the ways or grooves are liable to become stopped by dirt or the like, the jaws thus being prevented from operating pro erly. In thesecond form the rip is of sue a nature that whenit once taies hold it cannot be loosened, and if the device fails to lift the casing it must either be left iii the well or something must break.

It is the principal object of my invention to provide means whereb the jaws can be forced into engagement w1th the inner walls of the casing in a verysimple manner and in such a way that no accumulation of dirt and other obstacles will prevent their 0 eration,

rovide for oosening it a pears to be impossible to raise the casing wit the spear.

Further. objects of the invention will appear below.

Reference is to be had to the accompanying drawings, forming a part ofjthisfspecification, in which similar characters of reference indicate corresponding parts in all thefi es.

Figure 1 is a vertical central sectiona view of a well-casing, showing infull lines the positions of the parts ofthe device when being lowered and in dotted lines the positions when being raise parts being broken away.

Fig. 2 is a similar view at right angles to Fig.

1, showing the arts in the'position represented by dotte lines in Fig. 1; and Figs. 3

and 4 are sectional views on the lines 3 3 and- 4 4, respectively, of Fig.-2. a

I have illustrated a rod a of the usual construction and adapted tobe moved up and down in-a well-casing by any ordinary means.

This construction ,support during the downwar conical surface-a, which constitutes a swage forstriking' the walls of the casing when they are forced inwardly by outside pressure.

ermits the spear to be lowered in wells w iich are injured in this manner without the employment of a separate tool. Immediately above the conical section a is a conical s ace 0, the function of which will be explained below.

Located on a'. portion of'the rod 0, some distance above the .surface a? is a support or ring I). To this support are pivotally connected two or more oppositely-disposed links c, which support jaws d at their lower ends.

These jaws are provided with corrugations d upon their outer surfaces and may be formed of wrought-iron. It will be observed that these aws hang freely from the support and that no ways or other guides are necessary to insure their movement in the proper direc tion. Ordinarily the ring I; is supported in the position shown infull lines in Fig. 1 and the 'aws hang freely in inoperative position therefrom; but when the spear has been lowered to the proper depth and then again raised it is designed to have the jaws remain in operative stationary position with respect to the rising spear, so that the conical surface a, will'engage the inner edges of the jaws and force them outwardly against the casing. This gives the gripping action which is necessary in orderto raise the casing. In order to provide for this operation, I emplo a spring-catch e, mounted on the rod an engaging the support 1). This catch has a shoulder e at its top for holding the support I) at certain times. also has a convex shape near its top below. theshoulder. This convex art holds the d motion of the spear; but any material resistance to the rise ofthe support when the spear cause the support to ride down over the catch, thereby permitting the jaws to enga e the conical surface 'a.

support to prevent its rising with the spear, I

have located springs f upon it. These springs are bowed outwardlty,

so as to norm ally engage thein'ner surface 0 the casing, and then are drawn inwardly at f f to prevent their edges from engagingthe edges of the sections of the casing and stopping theapparatus in its deis raised will- In order to provu. e for exerting the proper reslstance upon the scent. For the purpose of adding rigidity to this feature I have provided a frame g, which is connected with the lower ends f of the w iprings'and is located inside of the links 0."

will be seen, therefore, that any force tending to move the projecting portions of the spring inwardly will force this frame downwardly with respect to thesupport, and consequently the springs bear withconsiderable force against the sides of the casing. For

, the purpose of preventing the support from moving up while the spear is descending on account of the continual friction of the sprin sf on the casing'I have pivoted a dog h to t e rod (1.. This dog bears in a notch b in the upper surface of the support I) and has a counterweight 7c.

The operation of the device is very simple. When it is to be lowered into the well, the support I) is located on the convex part of the catch e and is held up thereby. This places the jaws d in a position above the conical surface 0. The dog it holds the support 1) against any action tending to force it upwardly on the spear. The springs f bear against the casing throughout the length thereof. As it is lowered the swage a remedies any defect in the walls of the-casing the support I), (the dog now being out of the caused by outside pressure and makes a clear opening through which the remainder-of the instrument may be lowered. When the device has been lowered sufficiently, it is sud denly drawn up. The friction of the springs f against the wallsof the casing is sufficient to cause the resistance of the catch a to be overcome and to allow the main bodyof the spear to be drawn up, leaving the parts attached to the support I) in a lower position than before. This disengages the notch 11' from the dog it and permits the counterweight to' swing'the do'g up ,out of the way. As

the spear is drawn up the conical surface a engages the inner edges of the jaws dfand forces them outward into such a position as to grip the inner surface of the casing. The further upward movement of the support usually results in the withdrawal of the casing from the well. If this does not happen, however, and if it isfound that the casing cannot be withdrawn, the spear can again be lowered, which will move the catch e below claim as new and desire to secure by Letters Patent- 15A casing-spear comprising a rod, mov-r able jaws connected therewith, a catch on the rod for holding the jaws, and means for engaging the casing to retard the upward motion of the jaws when the rod is raised and to release them from the influence of said catch."

2. A casing-spear comprising a rod, movable jaws connected therewith, a catch on the rod for holding the jaws, and means for engagin the casing to retard the upward motion 0 the jaws when the rod is raised, and to release them from the influence of said catch, said means comprising a sprin connected with the jaws and adapted to car on the wall of the casing. 1

3. A casing-spear comprisinga rod, a support mounted thereon, jaws connected with said support, a catch on the rod for engaging the support, and means for engaging the casing, said means being connected with said jaws.

4. a conical surface tapering'upwardly, a support-mounted thereon, jaws connected with said support, a catch on the rod for engaging, the support, and means for engaging the casing to retard the upward motion of the jaws A casing-spear comprising a rod having when the rod is raised and release them from the influence of said catch."

5. A casing-spearcompi ising a rod having a conical surface tapering upwardly, a sup-.

port mounted thereon, jaws connected with said support, a catchon the rod-for engaging the support, and means for engaging the casing to retard the upward motion ofthe 'aws when the rod is raised and release them om the influence of said catch; said means comprisin a spring connected with the'support and a apted to bear on the wall of the casing.

6. In a casing-support, the combination of a rod having a tapering surface on the lower part thereof, a catch on said rod, a ring adapted to be held in elevated position on the rod by said catch, links pivotallyconnected with the ring, jawsconnected with said links and located in a position to be engaged by said conical surface when the rod is raised with respect to the ring, and s rings mounted on said ring and ada ted to car on the wall of a well-casing, sai springs having inwardlyprojecting ends.

7. A casing-spear comprising a rod having a conical surface thereon tapering upwardly,

a spring-catch on the rod having a 'shoulder I thereon, a support movablymounted on the rod and adapted to be held in an elevated position by said catch, links p'rvotally connected with said su port, jaws connected with said links and a apted to be engaged by said conical surface, and means for normally preventing the support from mQVing above said shoulder. I

8. A; trip casing-spear having a rod, a

s ring provided with a convex portion and a s oulder above-the convex portion, a jawsupport adapted to be heldby the convex portion of the spring, and means for preventing the support shoulder. 4

9. A trip casing-spear having a rod, a spring provided with a convex portion and a shoulder above the convex portion, a jawsupport adapted to be held by the convex portion of the spring, and means for preventing the support from moving above the shoulder; said means comprising a movable dog adapted to engage the suppoi't, and means for moving the dog out of engagement with the support when the latter is moved downwardly with respect to the rod.

10. A casing-spear, comprisinga rod, a movable jaw-support thereon, means for holding-the support in a certain position on the rod, a pivoted dog bearing on the supfrom moving above the port when held in said position, and a counterweight for moving the dog out of engagement with the support when the latter is lowered from said position.

11. A casing-spear comprising a rod, at spring-catch on the rod having a shoulder, a support movably mounted on the rod and ada ted to be held in an elevated position by sai catch, jaws movably connected with said sup ort, and means for preventing the su port 0111 moving above said shoulder.

, n testimony whereof I have signed my 0 name to this specification in the presence of two subscribing witnesses.

' WILLIAM H. KESSELMAN.

Witnesses:

WM. HORN,

S. M. FLANEGIN. 

